Engine Starting - Airmanship
I was always taught never to start engine(s) with the tail pointing directly towards open hangar doors and also with the aircraft a "safe" distance from the hangar due to fire risk on start-up. Starting the engine accordingly is a good way to upset engineers working in said hangar by blowing all the dirt/grit into the hangar!
Sometimes I see quite experienced pilots (including instructors, I am sad to say) ignoring this basic piece of airmanship. Am I being fussy on asking ground crew to position the aircraft suitably for start-up?